Signal processing method and apparatus, signal reproducing method and apparatus, and recording medium
AssigneeKabushiki Kaisha Toshiba
InventorsTadashi Kojima, Hisashi Yamada, Kouya Tochikubo, Hideki Mimura, Taku Kato, Tooru Kamibayashi, Akio Tanaka
Life of this patent
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Abstract
A signal processing method multiplexes/arranges digital data of a specific unit to form a predetermined unit, adds an error correction code to the predetermined unit to constitute an error correction coded block, replaces a part of the error correction coded block with specific data, and outputs the error correction coded block with the specific data being replaced to a transmission medium or a recording medium.
Claims24
A signal processing method comprising:
- forming data packs by dividing main data to be processed into constant size data packs;
- forming data blocks including data sectors, in which the same data pack is multiplexed/arranged in at least two data sectors;
- adding an error correction code to each of the data blocks to constitute error correction coded blocks;
- replacing one of the at least two data sectors with specific data;
- and
- outputting the at least one error correction coded block after replacing the one of the at least two data sectors with the specific data to a transmission medium or a recording medium.
A signal processing method for processing an error correction coded block transmitted through a transmission medium or reproduced from a recording medium, the error correction coded block being obtained by forming data packs by dividing main data to be processed into constant size data packs, forming data blocks including data sectors in which the same data pack is multiplexed/arranged in at least two data sectors, adding an error correction code to each of the data blocks to constitute the error correction coded blocks;
- replacing one of the at least two data sectors with specific data;
- and outputting the at least one error correction coded block after replacing the one of the at least two data sectors with the specific data to the transmission medium or the recording medium, the method comprising:
- reproducing an original error correction coded block by copying a data pack of another of the at least two data sectors to the one of the at least two data sectors;
- and
- performing an error detection/correction processing with respect to the original error correction coded block.
A signal processing apparatus comprising:
- a data pack forming unit configured to form data packs by dividing main data to be processed into constant size data packs;
- a data block forming unit configured to form data blocks including data sectors, in which the same data pack is multiplexed/arranged in at least two data sectors;
- an adder configured to add an error correction code to each of the data blocks to constitute error correction coded blocks;
- a data replacing circuit configured to replace one of the at least two data sectors with specific data;
- and
- an output circuit configured to output the at least one error correction coded block after the one of the at least two data sectors is replaced with the specific data to a transmission medium or a recording medium.
Dependencies are inferred from the claim text.